Gianmarco Spera

Closing of density wake in concentrated colloidal suspensions: two regimes governed by compressibility, friction, and self-propulsion

When an obstacle moves through a compressible medium, it creates a density perturbation. Theoretical arguments regarding the shape of this density wake in Brownian suspensions either suppose infinite dilution or describe only the far field. Here, we study via experiments and numerical simulations the closing of the den...